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From Sylvain Lebresne <>
Subject Re: Questions about weak reads
Date Wed, 09 Dec 2009 16:33:36 GMT
On Wed, Dec 9, 2009 at 5:09 PM, Jonathan Ellis <> wrote:
> On Wed, Dec 9, 2009 at 9:37 AM, Sylvain Lebresne <> wrote:
>> But otherwise, the discrepancy between code and comments suggests that the
>> code was changed. If so, what was the rational behind the change ?
> I'm guessing you're reading the 0.4 source?  This has been cleaned up
> in trunk.  At least I'm pretty sure it has, because I remember the
> comments you're referring to, and I don't see them anymore. :)

Well, I just checkout from svn
(svn checkout
to be sure, the NEWS.txt and CHANGES.txt corroborate that it's 0.5dev.
Still, the comment for weakReadRemote starts with
  "Read the data from one replica.  If there is no reply, read the
data from another."
and the one for weakReadLocal starts with
  "This function executes the read protocol locally and should be used
only if consistency is not a concern.
    Read the data from the local disk and return if the row is NOT
NULL. If the data is NULL do the read from
    one of the other replicas (in the same data center if possible)
till we get the data."

In any case, at least for readRemote, why when the "suitableEndpoint"
timeout another
node is not tried ?

> -Jonathan

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